Type-writing machine.



PATBN'IBD FEB. 28, 1905. W. I. BARRUN 61: H. W. MERRITT.

TYPE WRITING MACHINE.

APPLICATION FILED .TUNE U. 1902 2 SHEETS-SHEET l.

MTNESEEEz INVENTmrQi l, f ,/4 y Jam u THEIR ATTUHNEY No. 783,669. ATENTED FEB. 28, 1905. W. J. BARRON & H. VV. MERRITT.

TYPE WRITING MACHINE.

APPLIUATION FILED JUNE s. 1902.

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Patented February 28, '1905.

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VALTER J. BARRON, OF BROOKLYN, NEW YORK, AND HENRY W.

MERRITT, OF SPRlNGrFlELl), MAStflAOllUSltllS, ASSIGNORS TO DEN@- MORE ,PYPENVRIIER COMPANY, OF SYRAOUSE, VNEW' YORK, A OOR- PORATION OF NEW YORK.

SPCIFICATION forming part of Letters Patent No. 783,669, dated February 28, 1905. Original application filed February 6, 1902, Serial No. 92,839. bividcd and this application tiled .Tune 6, 1902. Serial No. 110,431.

/'o n.7] 'who/1t it 1mi/.y cori/cern;

'Be it known that we, VVAI/rnn J. lnmmu, a resident ot' thel borough ot' Brooklyn, county ot' Kings, city of New York, and State oi"l New i York, and H nNuY \V. Mesurer, a resident oll Springfield, county of Hampden, and State oll lVIassachusetts, citizens oi the United States, have invented certain new and useful lmprovements in 'lype-lVi-iting Machines, ol' which the 'following' is a specification.

rlhis case is a division oi our aplilication liled February 6, 1902, Serial No. 92,839.

Our invention relates to type-writing machines, and more particularly to the carriagefeed mechanisms thereof.

One object of our invention is to provide simple and eflicient mechanism of the charac ter described.

A further object of our invention is to provide simple and efficient mechanism tor stepping the carriage back in a direction opposite to that of its feed.

To these and other ends which will hereinafter appear our invention consists in the Aifeatures or' construction, arrangements of parts, and combinations of elements to be hereinafter described and claimed.

ln the accompanying drawings, wherein like reference characters designate like parts in the various views, Figure lis a vertical sectional view of one form of type-writing machine embodying our invention, the section being taken from front to rear of the machine. Fig. 2 is a detail side view of a portion of the mechanism for back-stepping the carriage. Fig. 3 is a rear elevation oi the same. Fig. iis an enlarged central vertical section ot the feed or escapement wheel and certain oi2 its cooperating parts, the section being taken on line :I: :n oi Fig. 5. Fig. 5 is a rear sectional view of the feed-wheel and a portion of its cooperating mechanism, certain parts beingI broken away to show others.

We have shown the various features oit our invention applied toa Densmorc type-writmi;I machine; but it should be understood that they or one or more ot' them may be employed in ty pe-writing machines of other makes.

1 designates the main frame of the machine,

2 the usual top plate, and 3 the key-levers, which are connected by links 4 in a suitable manner to actuate the typebars 5, which are pivotcd to hangers G, secured to the top plate 2. Each ol the key-levers is provided with the usual tigure-key T and with a hook t5, which bears upon a transverse universal bar t), that has a rearwardly-cxtending arm at each end, which is pivoted to the frame ol the machine at 1l). I )ivoted to the universal bar i) at 11 is a link 152, preferably made ot' two parts, which may be adjustably united by screw-threaded connections 13. The upper end oi.I this link 12 is provided with an eye 11i, that engages a notched portion 15 of an arm 16, which is preferably in the t'ormot a screw that extends through a threaded hole in a depending stud 17 ot' the .log-rockei', whereby the said arm may be adjusted to bring the inner end thereoit closer to or to move it Vlarther Vt'romthe pivotal center ol the rocker in order to vary or regulate the throw imparted tou the rocker and the feedwlogs carried thereby. The adjustment 13 enables the link 12 to be lengthened or shortened in accordance with the adjustment olE the arm 1G. The

Yfeed-dogs 18 18X and their rocker 19 alter actuation are returned to normal position by a spring 2.0, which is suitably connected at one end to an arm 20X on the rocker (see Fig. 5) and at its other end to a [xed arm 2l on the machineflrame. The feed -dogs 18 and 18"* cooperate with a feed-wheel 2Q, which, as will be seen upon reference to Figs. et and 5, is secured to a sleeve 23, that surrounds and is loosely carried upon a shalt la and is prevent ed 'from moving longitudinally thereon in one direction by a sleeve 23, which secured to the shalt 2a by a set-screw.

The shaft lei has cone-bearings at its ends which cooperate with antifriction-balls 24.-, (see Fig. 1,) which revolve in circular raceways. One raceway is lormed ina brac-.kot 2a", that is secured to the top plate 2. ol the machine, and the other racewayis 'formed ina screw-threaded adjustable plugI 24", that takes into a threaded openingI in the ln'acket-arm 24, which Alorms part of the bracket 9.a". By these means an el'licient hall-hearing support is provided for the shaft 24, and the plug 24C i may be turned by a screw-d river (a slot being provided in the plug for this purpose) to compensate for any wear that may take place in i the balls or the bearings.

Screws 25, which unite the sleeve 23 to the feed-wheel 22, likewise connect a ratchetwheel 26 to the feed-wheel to rotate therewith. The teeth of the ratchet-wheel 26 are disposed in an opposite direction from the teeth of the feed-wheel, as may be clearly seen upon reference to Fig. 5.

Mounted to one side of the feed-wheel 22 is a back-stepping ratchet-wheel 27, which is provided with a laterally-extending' collar or boss 28, that surrounds the shaft 24 and is connected thereto and to a shaft 29X, which is secured to or forms part of a feed-pinion 29, by a set-screw 30. The back-stepping ratchetwheel27 is provided with a laterally-projecting circular flange 31, which extends toward the feed-wheel 22 and surrounds the intermediate ratchet-wheel 26, connected thereto. The ratchet-wheel 27 has pivoted thereto within the fiange 31 a pawl 32, which is normally maintained in engagement with the ratchetwheel 26 by a springl 33. The flange 3l, in addition to acting as a housing for the pawl 32 and ratchet 26, constitutes an abutment to prevent a longitudinal movement in one direction of' the escapement or feed wheel 22 and the sleeve 23, to which it is connected.

Pivoted to a fixed portion of the machine is a back-stop pawl 34, the pivot of which is indicated at 35. The engaging nose 36 of this pawl is normally pressed in the direction of the feed-wheel by a spring 3T, that bears at one end upon a fixed portion ofthe machine at 38 and at the other end upon the pawl 34 at 39. The lower end of this pawl 34 is extended at 40 to form a stop that is adapted to abut against a fixed part at 4l to limit the movementof the pawl toward the feed-wheel 22.

Then the parts are in the normal position, the pawl 34 will engage the back of one of the teeth of the feed-wheel, as shown in Fig. 5, and prevent a backward movement of the feedwheel, whereas a rotation of the .feed-wheel in the direction of the arrow in Fig. 5. which corresponds to the feed movement of the carriage` will cause the pawl 34 to be defiected to one side to permit a free movement of the feed-wheel. The feed-pinion 29 is adapted to i engage and cooperate with the teeth 42 of a feed-rack 43, that is carried by thc carriage a,

which carries the platen From the foregoing description it will be understood that a feed movement of the dogs will permit the feed-wheel to rotate in the direction of the arrow in Fig. 5, and thus perl mit the carriage connected thereto to be moved ,i by its usual driving-spring c in the direction of its feed and in an opposite direction to that l indicated by the arrow on the yfeed-rack in i Fig. 3 of the drawings. In this movement of the parts the carriage-driving spring' moves the rack 43, which turns the pinion 29, shaft 24, and ratchet-wheel 27. carrying the pawl 32. The pawl 32 turns the ratchet-wheel 26 and the feed-wheel 22, connected thereto. \Vhen, however, the carriage is moved back to the initial position, the pawl 32, which isA the initial position to begin a line of writing'.

The pawl 34 is employed to provide against any accidental reverse movement of the feedwheel du ring the return ofthe carriage. This pawl 34, as before explained, immediately engages the rear of one of the teeth of the feedwheel and prevents a movement thereof in a direction opposite to that of the arrow in Fig. 5, thus maintaining the feed-wheel against reverse mpv/ement and in a position where it is ready tocoperate with the feed-dogs to permit a movement of the carriage in the direction of its feed.

VIt is sometimes desirable to step the carriage back one or more letter-space distances in a direction opposite to that of its feed for the purpose of making a correction-as, for example, when a character has been omitted in a word. For this purpose we have provided at the keyboard of the machine a special key 44 on a lever 45, that has a depending projection 46. This key-lever 45 may be pivoted at 47, and the projection 46 thereof is adapted to coperatewith a crank-pin 48, carried upon a collar 49, that is rigidly secured to a rock-shaft 50. This rock-shaft 50 has a crank-arm 5l extending therefrom, and the rear or free end of this crank-arm is pivotally connected at 52 to an upwardly-extending arm or ligament 53, which carries at its upper end a back-stepping' pawl or hook 54, that is guided in its movements by a pin-and-slot construction 55 56, the pin 55 being on a fixed portion of the machine and the slot 56, which is inclined, being' on the pawl. A depression of the key 44 will cause the projection 46 to descend and the shaft 50 to be rocked and the crank-arm 5l to be moved down. This downward movement of the crank-arm 51 draws down the pawl 54 and-causes it to engage a tooth of the back-stepping ratchet-wheel 27 and turns the latter for a portion of a revolution. The movement thus transmitted to the back-stepping ratchet-wheel 27 Will be imparted to the feed-rack and carriage to move the same in the direction of the arrow in Fig. 3. During this movement of the back-stepping wheel the pawl 32, carried thereby, will ride freely over the teeth of its cooperating ratchet-wheel 26, so that at this time no movement is transmitted in the feed-wheel. A

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reaeee single depression of the key 44: will impart a l the leed-i'iinion, a ratchet-wheel rigidly semovement to the back-stepping wheel a distance which corresponds to one letter-space distance, and when the key 1s released the key and its coperating parts will be restored to ratchet-wheel which is secured to the escapetheir normal positions by a coiled spring 44X. (See Fig. 3.) y

lhe feed-rack 43, hereinbefore referred to,

mounted upon arms 57, that project from a rock-shaft 53, to which is secured a leafspring' 59, (see Fig. 1,) the free end of which bears against a portion of the carriage, as shown at 60, in order to maintain the feedrack i3 normally in engagement with its cooperating feed-pinion 29. The rock-shaft 53 is likewise provided with a lug 6.1, which is bifurcatlul at 62, so as to provide stops ('33. that cooperate with a lixed pin 64, carried upon the carriage, in order to limit the oscillation of the rock-shaft. The rock-shaft 53 has a linger-piece or arm (i5 secured to one end thereof, preferably the left-hand end, so that a depression of this linger-piece or arm 65 will rock the shaft 58, thus disengaging the feed-rack 43 from its pinion 29 to permit the carriage to be freelymoved in either direction.

Various changes may be made in detail construction without departing from the spirit of our invention.

What we claim as new, and desire to secure by Letters Patent, is"- 1. ln a type-writing machine, the combination of a feed-rocker, feed-dogs carried thereby, key-levers, a universal bar operated by said key-levers, an intermediate two-part link between said universal bar and rocker, the said parts being' adjustable one with relation to the other to lengthen or shorten the link, and a screw-arm carried by said rocker and to one end of which the link is connected, whereby the screw-arm may be turned in its bearings to project one end of the screw-arm farther from or to draw it nearer to the rocker to change the relation between the rocker and link and thus regulate the throw of the former.

2. In a type-writing machine, the combination of a power-driven carriage a feed-rack carried by said carriage, a feed-pinion mounted upon the framing of the machine. an escapement-wheel loosely mounted upon the shaft ofk the feed-pinion, a ratchet-wheel rigidly secured to the escapenient-wheel, a back-'feed wheel fixed to said pinion-shaft, a pawl carried by the back-feed wheel and adapted to engage the ratchet-wheel which is secured to the escapement-wheel, feed-dogs which coperate with the escapement-wheel, and means for operating' the back-feed wheel for moving the carriage in a direction opposite that of its feed.

3. Aln a type-writing machine, the combination of a power-driven carriage, a feed-lack carried by said carriage, a feed-pin ion mounted upon the framing of the machine, an escapement-wheel loosely mounted upon the shaft of cured to the escapement-wheel, a back-feed ratchet-wheel fixed to said pinion-shaft, a pivoted spring-pressed pawl carried by the backfeed ratchet-wheel and adapted to engage the ment-wheel, feed-dogs which cooperate with the escapement-wheel, and a pawl for operating the back-feed ratchet-wheel for moving the carriage step by step in a direction opposite to that of its feed.

1L. ln a ty pe-writing machine, the combination of a power-driven carriage, a feed-rack carried by said carriage,a feed-pinion mounted upon the framing of the machine, an escapement-wheel loosely mounted upon the shaft of the feed-pinion, a ratchet-wheel rigidly secured to the escapement-wheel, a back-feed ratchet-wheel fixed to said pinion-shaft, a pivoted spring-pressed pawl carried by the backfeed ratchet-wheel and adapted to engage the ratchet-wheel which is secured to the escapement-wheel, feed-dogs, which cooperate with the escapement-wheel, a back-'feed pawl 'for operating the back-feed ratchet-wheel and which is normally out of engagement therewith, and a key at the keyboardwhich is operatively connected to the back-feed pawl for moving the carriage step by step in a direction opposite to that of its 'feed at each depression of said key.

1n a type-writing machine, the combination of a power-driven carriage, a feed-rack carried by said carriage, a feed-pinion mounted upon the framing of thc machine, an escapement-wheel loosely mounted upon the shaft of the feed-pinion, means for preventing a backward rotation of the escapement-wheel, a ratchet-wheel rigidly secured to the escapement-wheel, a back-feed wheel fixed to said pinion-shaft, a pawl carried by the back-feed wheel and adapted to engage the ratchet-wheel which is secured to the escapement-wheel,

`feed-dogs which cooperate with the escapement-wheel, and means for operating the backfeed wheel for moving' the carriage in a direction opposite to that of its feed.

6. 1n a type-writing machine.v the combination of a carriage, a rack carried by the carriage, a Afeed-pinion meshing with said rack, a shaft detachably connected to the feed-pinion, means for affording a disconnection of the pinion from said shaft, an escapement-wheel carried by said shaft, and ball-bearings which support the shaft.

7. In a ty pe-writing machine, the combination of a carriage, a rack carried by the carriage, a feed-pinion meshing with said rack, a shaft for the feed pinion, an escapementwheel carried by said shaft, antifriction-balls which support the shaft, bearings for said balls, one of said bearings being at an end of the shaft and another intermediate of the feedpinion and escapement-wheel, and means for adjusting the bearings one with relation to IOO IIO

another to compensate for Wear upon the parts.

8. In a type-writing machine, the combination of a shaft, an escapement-Wheel carried by and operatively connected to said shaft, a pinion detachahly connected to said shaft, roller-bearings on the shaft at one end thereof and also intermediate the escapement-wheel and pinion, cooperating rollers, and rollerhearings on a fixed portion o1 the machine at one end of the shaft and intermediate the pinion and escapement-wheel.

9. In a type-Writing machine, the combination of a shaft, an escapement-Wheel carried byl and operatively connected to said shaft, a hack-spaeing ratchet-wheel connected to the shaft, a key-actuated pawl cooperating' with said back-spacing` ratchet-Wheel, means for guiding the pawl, a pinion detachably connected to said shaft, roller-bearings on the shaft at one end thereof` and also intermediate the escapement-Wheel and pinion, cooperating State of New York, this 2d day of June, A. D. 1902.

WALTER J. BARRON. HENRY W. MERRITT. l/Vitnesses:

K. V. DONOVAN, E. M. WELLs. 

